3M 6291 & 6391 HEPA Mask

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3M 6291 & 6391 HEPA Respirators

3M 6291 HEPA Respirators are Proudly Made in the USAYou can finally do your yard work without suffering through all of your allergy symptoms! Economical and efficient, this mask seals tightly around the face and provides true HEPA filtration to block out dust, mold, and pollen. Do chores inside or out with the protection you need to breathe clean air. Adjustable, latex-free straps allow you to customize the fit of this mask. The body of the the mask is easily cleaned with mild soap and water. Replacement 2091 filters can be purchased as often as you need them.

The P100 rating of the 3M 2091 filters exceeds the CDC's recommended N95 rating as an effective way to block the spread of pathogens like the Avian Flu, SARS and other influenza strains. By blocking 99.97% of particles, this P100 classification makes this respirator ideal for working with toxic & non-toxic particles, as well as oil based aerosols.

NOTE: 3M recently began printing manufacture dates on the filter packs for these masks. These are not expiration dates. Mask filters are good for use up to five years FROM the date stamped on the packaging.

3M Mask Sizing
Mask measurements are made from the top of the mask to the bottom of the chin.
6291 - 4.75"
6391 - 5"

3M HEPA Respirators Video

Product Reviews & Questions

Write A Review | Read all 61 reviews.
  Worked Great
Reviewed by: Allergic to dogs from Illinois

My in-laws have a dog that I'm severely allergic to. I can only last about 2 hours before my asthma gets dangerously bad. Don't want to spend the money for a hepa air purifier that will clean the air throughout the whole house. Using the mask I'm able to stay as long as I "want" to stay. It works!!!!
  heart saver
Reviewed by: able to farm from New York

im a heart transplant patient and this help when I am out getting in hay on the farm
  Great mask
Reviewed by: Allergy Sufferer from Oklahoms

I use the mask when I mow my yard. It works great!

Customer Q & A

Q1: which product is best for airborne gluten hypersensitivity especially the dust and fumes of cooked goods. I have to fly quite often and need the best protection possible with the most breathability while in-flight. Cause you

A: The 3M 8233 is probably your best bet. It's easy to take with you than the 6291 but offers HEPA filtration of particles. Odors are going to be another matter. To remove the particles that often make up odors, activated carbon is best, but if you go with a carbon mask, you'll give up particle filtration. The 6291 has organic vapor and multigas cartridges but when using these, the particle filtration is nowhere near as robust. HEPA filtration will capture some of the particles that make up odors and fumes, but certain elements cannot be filtered by physical methods HEPA. A mask like a N99 Vogmask might also be an option. Instead of HEPA filtration P100, the Vogmasks offers N99 very similar but does have a thin layer of activated carbon for odor adsorption. Hope that helps!

Q2: I am a home inspector and crawl into crawlspaces and attics daily. I come across rodent pings, dead rodents, dust from all manor of construction debris, molds, etc. I wear a HEPA respirator, but I am wondering what your recommendation for the best filter for this type of work would be? Thanks!

A: HEPA is going to be the best. While a carbon based filter will help with odors such as the dead rat you mentioned!, the vast majority do so at the expense of less than HEPA particle filtration. With likely the most common health hazard being mold, the particle filtration of a HEPA mask is likely the better bet. In terms of HEPA masks, the 6291 is really good. The upside for you is with replaceable filters, you can easily wash the body of the mask itself and replace filters as needed. The downside is probably cost and look. The 8233 or 8293 is also a good option only difference being that the 8293 will also trap oil based particles. The upside is this mask is softer, easy to tuck into a jacket pocket, and after several uses you can just toss it and get a new one. Either should work well for you. Hope that helps!

Q3: I'm going to be using the mask to clean out a shed with rodent pings. What is included with the mask? Does it come with the filters and cartridges or do I need to buy them separately?

A: This respirator comes with the mask as well as two of the HEPA rated P100 filters the big pink round ones. If you wanted something for odors/fumes, the Multi Gas cartridges are sold separately and would be used instead of the included P100 filters.

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3M HEPA Respirator Review

3M 6291 HEPA Mask

The 3M 6291 HEPA Mask is one my favorite face masks. Unlike disposable masks, the 6291 is durable and can be used repeatedly. I have owned this mask for a several years, and have changed the HEPA filter cartridges twice. I use this mask for just about everything from yard work to more heavy duty projects like like replacing the grout in our shower. Depending on usage, you may have to replace the filters more often, so this will vary depending on use. After several years of service, this my assessment of the 6291 respirator.

What I like about the 3M 6291 HEPA Mask
  • Offers HEPA quality filtration of oil and non-oil based particles
  • Versatile filtration ideal for a wide range of uses from pollen and mold particles while raking leaves to filtering oil based particles you might encounter while staining or working with wood or fiberglass while renovating or working on your home
  • Creates a very tight seal
  • It is durable and easy to clean after dirty projects - rinse respirator itself with warm water or with a mild detergent (filters NOT washable)
  • Fits very snugly with two straps and is fully adjustable
  • Latex free
  • Two sizes available
  • MultiGas or Organic Vapor cartridges optional
  • Made in the USA
What I did not like about the 3M 6291 HEPA Mask
  • As with any tight sealing mask, in warm conditions it will make the area around my mouth sweat, so some moisture will get trapped inside

In all, the 3M 6291 HEPA Mask is the best masks we offer. With NIOSH P100 filtration, this respirator is one of the most versatile available today. It is completely sealed, non latex, HEPA grade, and you can replace the filters when necessary. If you, have allergies, do a lot of yard work, work in a shop or in places where things toxic and non-toxic particles are a concern, I strongly suggest using this mask. The filtration this mask provides also exceeds the CDC's recommended filtration level (N95) to help prevent the spread of the influenza virus. Aside from it being a little warm with extended use or in warm conditions, there is very little not to like about this durable HEPA respirator.

Could not wait to try Safeguard Window Filters. I am using them, am very pleased and have high hopes that my solution to open windows is at hand!
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Additional Resources

3M Respirator/Mask Fit Check/Test    3M Respirator Fit Test
Compare Masks
Mask Buying Guide
Mask FAQ
Mask Replacement Filters


Discount 6391 HEPA Respirator
3M 6291 HEPA - Medium (Item#: 3M0001) $22.99
3M 6391 HEPA - Large (Item#: 3M0001-L) $22.99

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